我如何继续运行我的控制台应用程序,直到一个键按下(如Esc按下?)

我假设它环绕着一个while循环。我不喜欢ReadKey,因为它阻塞操作并要求一个键,而不是只是继续听按键。

如何做到这一点呢?


当前回答

从视频诅咒的。net控制台应用程序在c#由杰森罗伯茨在http://www.pluralsight.com

我们可以这样做,有多个运行过程

  static void Main(string[] args)
    {
        Console.CancelKeyPress += (sender, e) =>
        {

            Console.WriteLine("Exiting...");
            Environment.Exit(0);
        };

        Console.WriteLine("Press ESC to Exit");

        var taskKeys = new Task(ReadKeys);
        var taskProcessFiles = new Task(ProcessFiles);

        taskKeys.Start();
        taskProcessFiles.Start();

        var tasks = new[] { taskKeys };
        Task.WaitAll(tasks);
    }

    private static void ProcessFiles()
    {
        var files = Enumerable.Range(1, 100).Select(n => "File" + n + ".txt");

        var taskBusy = new Task(BusyIndicator);
        taskBusy.Start();

        foreach (var file in files)
        {
            Thread.Sleep(1000);
            Console.WriteLine("Procesing file {0}", file);
        }
    }

    private static void BusyIndicator()
    {
        var busy = new ConsoleBusyIndicator();
        busy.UpdateProgress();
    }

    private static void ReadKeys()
    {
        ConsoleKeyInfo key = new ConsoleKeyInfo();

        while (!Console.KeyAvailable && key.Key != ConsoleKey.Escape)
        {

            key = Console.ReadKey(true);

            switch (key.Key)
            {
                case ConsoleKey.UpArrow:
                    Console.WriteLine("UpArrow was pressed");
                    break;
                case ConsoleKey.DownArrow:
                    Console.WriteLine("DownArrow was pressed");
                    break;

                case ConsoleKey.RightArrow:
                    Console.WriteLine("RightArrow was pressed");
                    break;

                case ConsoleKey.LeftArrow:
                    Console.WriteLine("LeftArrow was pressed");
                    break;

                case ConsoleKey.Escape:
                    break;

                default:
                    if (Console.CapsLock && Console.NumberLock)
                    {
                        Console.WriteLine(key.KeyChar);
                    }
                    break;
            }
        }
    }
}

internal class ConsoleBusyIndicator
{
    int _currentBusySymbol;

    public char[] BusySymbols { get; set; }

    public ConsoleBusyIndicator()
    {
        BusySymbols = new[] { '|', '/', '-', '\\' };
    }
    public void UpdateProgress()
    {
        while (true)
        {
            Thread.Sleep(100);
            var originalX = Console.CursorLeft;
            var originalY = Console.CursorTop;

            Console.Write(BusySymbols[_currentBusySymbol]);

            _currentBusySymbol++;

            if (_currentBusySymbol == BusySymbols.Length)
            {
                _currentBusySymbol = 0;
            }

            Console.SetCursorPosition(originalX, originalY);
        }
    }

其他回答

如果你正在使用Visual Studio,那么你可以在调试菜单中使用“开始不调试”。

它会自动写“按任意键继续…”到控制台完成应用程序后,它会让控制台为您打开,直到按下一个键。

最短的方法:

Console.WriteLine("Press ESC to stop");

while (!(Console.KeyAvailable && Console.ReadKey(true).Key == ConsoleKey.Escape))
{
    // do something
}

Console. readkey()是一个阻塞函数,它会停止程序的执行并等待按键,但多亏了检查Console。KeyAvailable键,while循环不会被阻塞,而是一直运行,直到按下Esc键。

根据我的经验,在控制台应用中,读取最后按下的键的最简单方法如下(以箭头键为例):

ConsoleKey readKey = Console.ReadKey ().Key;
if (readKey == ConsoleKey.LeftArrow) {
    <Method1> ();  //Do something
} else if (readKey == ConsoleKey.RightArrow) {
    <Method2> ();  //Do something
}

我用来避免循环,而不是我在一个方法中写上面的代码,我在“Method1”和“Method2”的末尾调用它,所以,在执行“Method1”或“Method2”后,Console.ReadKey()。键已准备好再次读取键。

下面是一种方法,可以让您在不同的线程上执行某些操作,并开始侦听不同线程中按下的键。当您的实际进程结束或用户按Esc键终止该进程时,控制台将停止其处理。

class SplitAnalyser
{
    public static bool stopProcessor = false;
    public static bool Terminate = false;

    static void Main(string[] args)
    {
        Console.ForegroundColor = ConsoleColor.Green;
        Console.WriteLine("Split Analyser starts");
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine("Press Esc to quit.....");
        Thread MainThread = new Thread(new ThreadStart(startProcess));
        Thread ConsoleKeyListener = new Thread(new ThreadStart(ListerKeyBoardEvent));
        MainThread.Name = "Processor";
        ConsoleKeyListener.Name = "KeyListener";
        MainThread.Start();
        ConsoleKeyListener.Start();

        while (true) 
        {
            if (Terminate)
            {
                Console.WriteLine("Terminating Process...");
                MainThread.Abort();
                ConsoleKeyListener.Abort();
                Thread.Sleep(2000);
                Thread.CurrentThread.Abort();
                return;
            }

            if (stopProcessor)
            {
                Console.WriteLine("Ending Process...");
                MainThread.Abort();
                ConsoleKeyListener.Abort();
                Thread.Sleep(2000);
                Thread.CurrentThread.Abort();
                return;
            }
        } 
    }

    public static void ListerKeyBoardEvent()
    {
        do
        {
            if (Console.ReadKey(true).Key == ConsoleKey.Escape)
            {
                Terminate = true;
            }
        } while (true); 
    }

    public static void startProcess()
    {
        int i = 0;
        while (true)
        {
            if (!stopProcessor && !Terminate)
            {
                Console.ForegroundColor = ConsoleColor.White;
                Console.WriteLine("Processing...." + i++);
                Thread.Sleep(3000);
            }
            if(i==10)
                stopProcessor = true;

        }
    }

}
Console.WriteLine("Hello");
var key = Console.ReadKey(); 
DateTime start = DateTime.Now;
bool gotKey = Console.KeyAvailable;

while ((DateTime.Now - start).TotalSeconds < 2)                
{
    if (key.Key == ConsoleKey.Escape)
    {
       Environment.Exit(0);
    } 
    else if (key.Key == ConsoleKey.Enter)
    {
       break;
    }